Parameter 8901 Better - Fanuc

A: Possibly. Axis hunting (oscillation at the quadrant change) is often caused by 8901=1. Switching to 8901=2 engages S-curve acceleration, which usually eliminates quadrant marks.

Changing Parameter 8901 alone is not sufficient to improve performance. It functions as a "switch." To achieve actual performance gains ("better" results), the following dependent parameters must be optimized in conjunction: fanuc parameter 8901 better

Why is this parameter considered "better" or essential for modern machining? A: Possibly

Many shops use a “Reference Tool” or “Master Tool” to set the entire work coordinate system (G54). Setting 8901 = 1 allows you to shift the entire work offset (e.g., G54 Z) without corrupting individual tool geometry offsets. This is a massive time-saver when a casting or forging changes dimension mid-run. Parameter 1732: Maximum feed rate for HPCC

For most production environments, Parameter 8901 should be set to 1.

However, strict documentation should be provided to operators. If a setup person attempts to "clear the machine" by pressing Reset multiple times, they may be confused why the coordinate system hasn't cleared to Machine Zero. This is a minor training hurdle compared to the safety benefits provided.

Note: This parameter works in conjunction with memory backup batteries. If parameter 8901 is set, it flags the SRAM area for work offsets as "protected/retained," ensuring that volatile memory keeps the G54 data alive during a controlled power-down, preventing the dreaded "0030 Power-off without memory backup" alarms or data clearing.